Extensible rule and pencil



E J. J. MURPHY EXTENSIBLE RULE ANDPENGIL Filed Nov. lO, 1.925

i rule extended to fu v I VFig-2 shows the same in colla sed form tterdiev Q-estema 1926.

v1,607,097 .PATENT OFFICE.,

:ramas J. MURPHY, or DENVER, coLonAno. i

EXTN'SIBLE RULE .AND YPENCIL.,

Animation mea nnvember 1Q, 1925. sensi No. 68,055.

` A This invention relates to Va combination pencil andextensible rule.Vv

p I'echanicsa and others oftentimes find .it necessary and veryconvenient to carry a I rule4 which will enable them to determine'distances either in the Englishy scale of inches or in the metric scale.'It is also frei quently desirable to have-a pencil .where it y @loan bereadily found vand used. Pencils of l0 `the type known as eversharp orwhich have a mechanism by means of which a molded piece of lead can beextrudeds as to always 'provide a proper pencil point areuiteextensively carried by the general pubhe. It is very seldom,however, that any one carries-about with himua rule of any kind.

It -is the', object of this invention to construct 'a pencil in` such -amanner that it `can be extended to a considerable len th and to provide"the'same' with graduations by meansoiswhich distances may be measured.pencil. is 'preferably formed of three M-,telescopic members of asquare' cross-section, the smaller and innermost member forming vthepencilproper and containing some suitable mechanism for controlling theextrusion of the lead. l if.. The type of pencil which I intend toemploy as the foundation for this rule is one 3Min which b rotating aportion of the pencil, the lea can be extended to any desired distance.l I

In order to describe my invention so that its construction canbe readilyunderstood, I shall have reference to the accompanying drawin in whichthe preferred embodiment t ereof has been illustrated andv in len h;

with a portion broken away to close the construction; and

Fig. -3 is a section takenlon line 3-3, Fig. 4

1, showing the manner of connecting vthe 'sections to one another.

My extensible rule consists tions, A, B, and C. The section indlcated byA is the pencil and is f ormed `from a f-o square piece of tubing withinwhose interior is housed the mechanism for controlling4 the lead. As-anysuitable mechanism may he employed for. this purpose, I have not goneinto details in explaining the means y which the lead -is controlled asthis is a separate invention from the combination re 1 shows'mlcombinedA .pencil and' of three secdescribed herein. One end of sectionA has a conical portion whichv has been indicated by numeral 1 andextending radiallyfrom this is a knurled flange 2, which can be a0grasped for the urpose of rotating the parts and of extru ing the lead3. 'Slidably on theV tubular member 4 of section A is aV similar`tubular member 5 whose interiordimensions are slightly larger than-the"exi l5 terior dimensions of the part 4, and yconnected to part 5 ofsection B is a similar. square tubular section 6, whose interiord.i'`mensions are slightly greater than the exterior dimensions ofthe part5.v In vorder tow prevent the several parts from "being separated onefrom the other, I secure .to the outer ends of parts and 5 a ferrule-'and to the inner partspf` sections 5 and 6 asimilar ferrule 8. Theseabut each other when the rule is extended 'to its utmost length andrevents the parts from bein separated. llVihen the parts are collapsthey also serve to keep them fromv wabbling wit respect to each other.In order to produce the necessary friction to hold the parts in-adjustedposition, I referably slit the ends of parts Il and 5 in t e mannerindicat- I ed by line 9 in Fig. 3. This makes the end v resilient andserves to press the outside of 35- the ferrule 7 againstthe'interior-of, the sur- 's rounding tube. One side of this extensiblescale is provided with graduations infinches and fractions of an inch inthe manner indicated on the right-hand side of the per- 00 spective viewshown in Fig. 1. The other side shown on'the left-hand side of theperspective view' in Fig. 1 is divided into parts representingcentimeters or some multiple or decimal thereof, so that the two scalesare 4always available eitherfor the English system or the metric system.The other two sides oi the parts 4, 5, and 6 are left blank andit is'the intention to apply to these sides somesuitable advertising matter,as it is for 100 this purpose as well as for the convenience of thecombination that this invention is intended. i

It will be noted that the base of the conical portion 1 has a Vdiametersomewhat 105 greater than the diagonal dimension of the` section Awhereby a shoulder D is formed which serves as a stop for the sectionsBand C when they are moved towards closed po- 'sition.

When the parts are collapsed they have lill vthe appearance shown inFig. 2 and have a l size substantially corresponding to that ofanordinary pencil of this type.

In order to prevent the pencil from becoming lost. anda to attach it tothe pocket, I have provided a clip'l() that is adapted to receivebetween it and the side of the pencil a portion of the pocket so as toprevent its accidental removal.

The knurled flange 2, aside from its function in enabling the lead to beregulated, also serves as a handle for the purpose of extending theseveral parts. If the conical end had a. perfectly smooth exteriorsurface, it is evident that more or less diHiculty would be experiencedin pulling the parts out into extended form; Whereas, With this annularridge, a good grasp can be had of the pencil section While the section 6can be firmly held by the fingers of the other hand.

Having no7 described my invention, what I claim as new is:

1. A combined pencil and measuring rule comprising in combination, threetelescopic sections ot rectangular cross-section, the

lsmallestI of which has a-wconical point provided With an axial openingfor the reception of a lead, said conical portion having an annularflange adapted to be grasped when moving the parts from collapsed toextend- .ed position, the larger end of said conical portion having ashoulder adapted to serve as a stop for the other sections when incollapsed relation.

2. In a combined pencil and measuring rule, in combination, a pluralityof telescopic sections cach formed from a rectangular tube. the smallerol said sections having a conical end provided with an axial opening forthe reception of a lead, the larger end of said conical portion having ashoulder that serves as a stop for the other sections Whcnin collapsedposition and having also an outwardly extending flange which serves as agrip for moving the parts from collapsed to extended position, one sidebeing graduated in inches and the other in centimeters.

In testimony whereof I aix my signature.

JAMES J. MURPHY.

